Machine for pressing plastic material into the interstices of corncob pipes.



No. 689,690. Patented Dec. 24, I901.

n. n. PURVES.

MACHINE FOB PRESSING PLASTIC MATERIAL INTO THE INTEBSTICES 0F OORNCOB PIPES.

(Application filed J'una 1o, 1901.)

UNITED STATES I PATENT OFFICE.

RULOF R. PURVES, OF WASHINGTON, MISSOURI, ASSIGNOR TO H. TIBBE &

SON MFG. COMPANY, OF WASHINGTON, MISSOURI, A CORPORATION OF MISSOURI.

MACHINE FOR PRESSING PLASTIC MATERIAL INTO THE INTERSTICES OF COBNCOB PIPES.

SPECIFICATION formingpart of Letters Patent No. 689,690, dated December 24, 1901.

Application filed June 10,1901. Serial No- 63,945. (No model.)

T all whom it may concern: not be forced with any considerable amount Be it known that I, RU'LOE R. PURvEs, a of pressure into the interstices, due to the citizen of the United States, residing at Washroughness of the pipe and the liability of blisington, county of Franklin, State of Missouri, tering the hands of the operator and making 5 have invented'a certain new and useful Imthe same sore by repeated operations. Conprovement in Machines for Pressing Plastic sequentlythe pipes were but imperfectly sup-' Materialinto the Interstices of Corncob Pipes, plied with the plastic material on their outer of which the following is a full, clear, and faces. Furthermore, it frequently happens 6o exact description, such as will enable others that too much material is applied to the pipe,

to skilled in the art to which it appertains to with the result that when the material dries make and use the same, reference being had it cracks, and when the outer-surface of the to the accompanying drawings, forming part pipe is sandpapered for the purpose of applyof this specification, in whiching shellac or varnish in the finish of the pipe Figure 1 is a top plan View of a generic form the plastic material,which has become hard, v

I5 of my improved machine for pressing plastic will flake or scale off, so that it is necessary material into the interstices of corncob pipes. to rehandle the pipe and again apply plastic Fig. 2 is a side elevational view, partly in secmaterial thereto. tion. Fig. 3 is a detail view of a developed The main object of this present invention form of the pressing portion of the presseris to save the hands of the operator and also 20 bar. Fig. 4 is an end elevational view of an to uniformly and effectively force the plastic amplifiedarrangement of presser-bars. Fig. material down into the interstices of the pipe,

5 is a side elevational view of the construc* so that said plastic material upon drying tion shown in Fig. 4. Fig. 6 is a side elevawould have a firm hold in the interstices and tional view illustratingafurther development not be liable to be displaced in the operation 25 of the pressing portion of the presserbar. of sandpapering or smoothing the pipe pre- Fig. 7 is a similar view of' a different form paratory to the application of varnish thereof presser-bar, and Fig. 8 is a top plan view to. Incidentally by the use of my invention of a still further development of the pressing and in addition to the above the pipe requires portion of the presser-bar. less 'finish in the way of sandpapering, be-

0 This invention relates to a new and useful cause the plastic material is more smoothly improvement in a machine for pressingplasand uniformly applied. tic material into the interstices of corncob In Fig. 1 of'the drawings I have shown pipes, the object being to simplify this opermerely a generic form of the pressing apparaation in the manufacture of pipes of the chartus; but in Fig. 4 I have illustrated the de- 35 aoter described and to more effectively press veloped' construction of the apparatus with the plastic material into the interstices or rerelation 'to the arrangement of the pressercesses appearing in the outer faces of the bars, and inFig. SIhaveshown the developed walls 'of the pipe. form of the pressing-surface provided upon 0 With these objects in view the invention the said presser bar or bars. The intermedi- 4o consistsin the arrangement,construction,and ate forms in the development of this presscombination of the several parts, all as will ing-surface are shown in Figs. 3 and 6. hereinafter bedescribed,and afterward point- I shall first describe the invention in the ed out in the claims. generic features illustratedin Fig. 1. 5

Heretofore in the manufacture of corncob In the drawings, A indicates a spindle 45 pipes plastic material, usually in the form of mounted in suitable bearings on a table or plaster-of-paris in a plastic state, has been other support, which spindleis provided with applied to the outer surface of a corncob pipe a pulley a, on which passes a driving-belt a. manually. The operator would take the plas- This spindle projects laterally beyond one of I00 tic material in one hand and slipping the the bearings to form a mandrel b for receiv- 5o bowl of the pipe on a rotating mandrel apply ing the bowl of the pipe B. V

the plastic material to the outer fa'ce'thereof. 0 indicates a lever or presser-bar mounted In this operation the plastic material would in juxtaposition to the mandrel, said lever having a handle by which it may be manipulated by the operator, while the inner or working end of the lever has, in the generic form shown in Fig. 1, a pressing portion which is in the form of a flat paddle or blade arranged under the bowl of the pipe. The lever is fulcrumed in a supporting-plate D, which forms a step-bearing, the cap (I of said plate cooperating therewith and providing a spherical socket for a ball 0, arranged upon a suitable stem secured to the lever C. In this manner the lever is susceptible of universal movement through this ball-and-socket joint and may be tilted or canted to accommodate the shape of the bowl, as well as oscillating laterally to evenly distribute the filling material throughout the length of the bowl.

In operation the bowl of the pipe is placed on the mandrel, the lever being swungout of the way so as not to interfere with this operation. The operator then applies the plastic material to the face of the bowl, leaving a surplus thereon, after which the lever is brought into play to force the plastic material into the interstices and recesses in the outer faces of the bowl and at the same time smooth and give to the bowl a good finish, the lever delivering the plastic material evenly throughout the surface of the bowl. The bowl is now removed from the spindle, sandpapered, and varnished, when it is finished.

In Fig. 3, which shows the first step in developin g thefpressing-surface from the generic form illustrated in Fig. 1, instead of having a fiat paddle I provide a roller 0 in the end of the lever O for cooperating with the bowl.

In Figs. 4 and 5 I have shown the developed arrangement in which two presser-bars E are pivotally mounted on opposite sides of the mandrel for cooperating with the bowl, said bars being connected together by links in the form of a toggle-joint, to the common pintle of which is arranged a rod 3, designed to extend under the support and be operated by the operators foot. Although for the purpose of simplifying the drawings I have not so shown the apparatus in said figures, it will be apparent that in the fully-developed form of the device said bars E are provided with the rollers shown in Fig. 8.

In Fig. 6, which illustrates further development of the pressing-surface, I have shown a frame G, mounted on the end of a lever, said frame carrying rollers g, designed to cooperate with the pipe-bowl on the mandrel at two points.

In Fig. 71 have shown a construction similar to that illustrated in Fig. 6, with the exception that I have arranged an endless belt g over the rollers, the operation of which will be readily understood.

In Fig. 8 I have shown the fully-developed form of pressing-surface,comprising two barrel-shaped rollers, whose diameters are such that the pivoted lever in being swung to cause contact between the rollers and the pipe-bowl at diiferent points will enable said rollers to arrangement, construction, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a machine of the character described, the combination with a rotating mandrel designed to receive the bowl of a cob pipe, and a pivoted lever arranged in juxtaposition to said bowl for pressing plastic material into the interstices or recesses in the surface of said bowl, said lever also having lateral oscillation; substantially as described.

2. In a machine of the character described, the combination with a rotating mandrel designed to receive the bowl of a cob pipe, 'and means for pressing plastic material into the interstices or recesses in the outer surface of said bowl, the mechanism also uniformly distributing the plastic material over the bowl; substantially as described.

3. In a machine of the character described, the combination with a mandrel designed to receive the bowl of a cob pipe, and a lever having a universal movement for cooperating with the outer surface of said bowland pressin g the plastic material into the interstices or recesses therein; substantially as described.

4. In a machine of the character described, the combination with a mandrel designed to receive the bowl of a cob pipe, of levers arranged on opposite sides of said bowl, and means for forcing said levers against the surface of the bowl, whereby said levers press plastic material into the interstices in the bowl; substantially as described.

5. In a machine of the character described, the combination with a mandrel designed to receive the bowl of a cob pipe, of a lever provided with a plurality of rollers operating at different points upon the bowl to press plastic material into the interstices therein; substantially as described.

6. In a machine of the character described, the combination with a mandrel designedto receive the bowl of a cob pipe, of a lever having lateral oscillation, and rollers mounted on said lever, said rollers being barrel-shaped so as to have an extended bearing on the surface of the bowl in different lateral positions of the lever for forcing plastic material into the interstices in the bowl; substantially as de scribed.

In testimony whereof I hereunto afi'ix my signature, in the presence of two witnesses, this 6th day of June, 1901.

RULOF R. PURVES.

Witnesses:

U. L. WEIRICK, GEo. H. PIKE. 

